package com.crr.servlet;

import com.crr.dao.UserDao;
import com.crr.dao.impl.UserDaoImpl;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
@WebServlet("/checkName")
public class CheckNameServlet extends HttpServlet {

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
        String username = request.getParameter("username");
        UserDao userDao = new UserDaoImpl();
        boolean flag = userDao.checkUserName(username);
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        //ajax
        if (flag) {
            out.print("true");
        } else {
            out.print("false");
        }

    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doPost(req, resp);
    }
}
